The standard kilogram is a platinum-iridium cylinder 39 mm in height and 39 mm in diameter. What is the density of the material?
21 475 kg/m3
Physics & Space Science
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The Sun is spherical due to
A) Earth circling it. B) Earth and Moon circling it. C) gravitation. D) none of the above
Physics & Space Science
A planet (or comet) will speed up as it approaches the Sun
Indicate whether the statement is true or false
Physics & Space Science
If a star has a parallax of .005", then its distance is ________ light-years
Fill in the blank(s) with correct word
Physics & Space Science
A parallel-plate capacitor with plate separation of 1.0 cm has square plates, each with an area of 6.0 × 10-2 m2
What is the capacitance of this capacitor if a dielectric material with a dielectric constant of 2.4 is placed between the plates, completely filling them? (?0 = 8.85 × 10-12 C2/N ? m2) A) 15 × 10-12 F B) 15 × 10-14 F C) 64 × 10-14 F D) 1.3 × 10-12 F E) 1.3 × 10-10 F
Physics & Space Science